1902.] PISHES FROM THE GOLD COAST. 331 



3. Bokitsa Mine — are two small rivers and a locality in the 

 Wasa district. 



4. Ingogosu is described on the label as a village in the mining- 

 centre of Kinkiankwa. 



5. Infoan, a small place on a tributary of the River Offim. 



6. Dunkwa, a place on the River Offim or on one of its 

 tributaries. Mr. Walker speaks of it sometimes as a place and 

 sometimes as a river. There is another place with the same 

 name north and inland of Cape Coast Castle. 



7. Odumasi, a place on the upper part of the River Enon, east 

 of Koumassi. 



8. Lake Busum-chi. 



9. Nyankoma, a place on the River Enon. 



10. Town of Akropon. 



Mr. "Walker's connection with commercial affairs on the West 

 Coast of Africa extended over a period of more than forty years, 

 the greater part of which he resided in the country. It seems 

 that the late Mr. T. Moore, Curator of the Liverpool Museum, 

 was the first to interest him in making collections of Reptiles 

 and Fishes. He retained this interest to the end of his life, much 

 advancing our knowledge of the fauna of the Gaboon counti-y and 

 the Gold Coast ; and there is no doubt that he would have 

 accomplished still more if circumstances had permitted us to supply 

 him with more ample means than were at his disposal, while, 

 moreover, the primary objects of his pursuits demanded nearly all 

 his time and energy. 



Chromis ogowensis. 



Chromis ogowensis GUnth. Ann. & Mag. N. H. 1896, xvii. 

 p. 271 ; Proc. Zool. Soc. 1899, p. 717. 



This species is not to be united with C. latus, to which it has 

 been referred by Boulenger (Proc. Zool. Soc. 1899, p. 125). In a 

 smaller specimen of C, latus the anterior maxillary teeth are 

 absolutely larger than, and the anterior mandibulaiy teeth as 

 large as, the corresponding teeth of larger specimens of 

 C. ogoivensis \ The pectoral fin may be rather shorter or 

 rather longer than the head ; it generally does not reach the 

 anal. 



Mr. Walker's latest collection contains several additional 



1 111 treating of the species of Chromis in the Congo, Mr. Boulenger (Poiss. du 

 Congo, p. 453) states that for specific discrimination no reliance is to be placed on 

 the number of teeth in the outer premaxillary series : first, because it varies " selon 

 les individus," and secondly, because as a rule the teeth are relativelj' smaller and 

 more numerous in adult than in young specimens. The first statement is opposed 

 to my experience. There are broad-toothed and narrow-toothed species ; but, of 

 course, there is some variation even in the former, and the limits of variation widen 

 in species characterized by small and numerous teeth, in which case it is not even 

 desirable or useful to attempt to state the number of teeth. That young individuals 

 have a smaller number than adult is true, as I also have already stated in Proc. 

 Zool. Soc. 1896, p. 217, but this dental development cannot be called variation ; with 

 the advancing growth of the jaws more teeth are added laterally. I continue to 



